My Edelbrock headed 408 went 10.06@130mph last year with a 750 holly so they are not a bad carb. Would it have gone faster with a bigger carb, I will find out this year.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time